/*********************************************************************************
 *                                                                               *
 * The MIT License (MIT)                                                         *
 *                                                                               *
 * Copyright (c) 2015-2020 aoju.org and other contributors.                      *
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 * Permission is hereby granted, free of charge, to any person obtaining a copy  *
 * of this software and associated documentation files (the "Software"), to deal *
 * in the Software without restriction, including without limitation the rights  *
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 * copies of the Software, and to permit persons to whom the Software is         *
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package org.aoju.bus.extra.json;

import org.aoju.bus.core.instance.Instances;
import org.aoju.bus.core.lang.exception.InstrumentException;
import org.aoju.bus.core.toolkit.StringKit;
import org.aoju.bus.logger.Logger;

import java.util.Iterator;
import java.util.ServiceConfigurationError;
import java.util.ServiceLoader;

/**
 * 用于根据用户引入的json库
 * 自动创建对应的json解析器
 *
 * @author Kimi Liu
 * @version 6.1.1
 * @since JDK 1.8+
 */
public class JsonFactory {

    /**
     * 获得单例的 {@link JsonProvider}
     *
     * @return 单例的 {@link JsonProvider}
     */
    public static JsonProvider get() {
        return Instances.singletion(JsonFactory.class).create();
    }

    /**
     * 根据用户引入的json解析工具jar，自动创建对应的json解析对象
     * 推荐创建的解析单例使用，此方法每次调用会返回新的解析器
     *
     * @return {@link JsonProvider}
     */
    public static JsonProvider create() {
        final JsonProvider engine = doCreate(JsonProvider.class);
        Logger.debug("Use [{}] provider as default.", StringKit.removeSuffix(engine.getClass().getSimpleName(), "Provider"));
        return engine;
    }

    /**
     * 根据用户引入的json解析工具jar，自动创建对应的json解析对象
     * 推荐创建的解析单例使用，此方法每次调用会返回新的解析
     *
     * @param clazz 解析器
     * @param <T>   泛型参数类型
     * @return {@link JsonProvider}
     */
    public static <T> T doCreate(Class<T> clazz) {
        final Iterator<T> iterator = ServiceLoader.load(clazz).iterator();
        while (iterator.hasNext()) {
            try {
                return iterator.next();
            } catch (ServiceConfigurationError e) {
                throw new InstrumentException("No json jar found ! Please add one of it to your project !");
            }
        }
        return null;
    }

}
